Microchip Technology AT24C04N-10SI-1.8

Overview

AT24C04N-10SI-1.8 from Microchip Technology (formerly Atmel) is a 4-kbit (512 × 8) I²C-compatible serial EEPROM optimized for ultra-low-voltage embedded systems. It operates from 1.8 V to 5.5 V, supports 100 kHz I²C bus speed at 1.8 V, features hardware write protection via WP pin, and delivers 1 million write cycles with 100-year data retention - used in battery-powered sensor nodes and industrial control configuration storage.

For engineers reviewing the AT24C04N-10SI-1.8 datasheet, AT24C04N-10SI-1.8 pinout, AT24C04N-10SI-1.8 application, or AT24C04N-10SI-1.8 equivalent, key selection considerations include its 1.8 V minimum supply, 8-byte page write capability, SOIC-8 package footprint, and compatibility with I²C masters requiring low-power nonvolatile memory with hardware write lock.

Technical Context

The AT24C04N-10SI-1.8 implements a two-wire I²C interface with Schmitt-triggered, noise-filtered SDA/SCL inputs and open-drain outputs. Its internal architecture organizes 4096 bits into 32 pages of 16 bytes each, using a 9-bit word address for random access.

Device addressing uses A2 and A1 pins (A0 is NC), enabling up to four AT24C04 devices on one bus. Write protection is controlled solely by the WP pin - tied to VCC to lock the full 4K array, or GND for normal read/write operation.

Key Specifications

Pinout & Package

AT24C04N-10SI-1.8 is housed in an 8-lead JEDEC SOIC (8S1) package, 3.9 mm × 4.9 mm body, 1.27 mm pitch, gull-wing leads.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar serial EEPROM applications.

Compared with AT24C04N-10SI-1.8, AT24C04D-SSHM-T offers smaller packaging but requires PCB redesign, while M24C04-RMN6TP extends temperature range and bus speed at 1.8 V - both serve distinct mechanical and thermal design constraints rather than functional drop-in replacement.

Availability

AT24C04N-10SI-1.8 is available at Aetrix Electronics and suitable for smart metering, industrial PLCs, IoT sensor nodes, and medical device configuration storage requiring stable component supply across long production lifecycles.

Supply support for AT24C04N-10SI-1.8 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Microchip Technology acquired Atmel in 2016 and maintains full product continuity, quality assurance, and long-term supply commitment for the AT24C series.

The AT24C04N-10SI-1.8 belongs to Microchip's serial EEPROM product line, designed specifically for reliable, low-voltage, I²C-based nonvolatile storage in space- and power-constrained embedded systems.

FAQ

What is the maximum I²C clock frequency supported by AT24C04N-10SI-1.8 at 1.8 V?

The AT24C04N-10SI-1.8 supports a maximum I²C clock frequency of 100 kHz when operated at 1.8 V. This is specified in the AC Characteristics table under fSCL for 1.8-volt operation. Higher frequencies (up to 400 kHz) are only guaranteed at VCC ≥ 2.5 V.

Does AT24C04N-10SI-1.8 require external pull-up resistors on SDA and SCL lines?

Yes, AT24C04N-10SI-1.8 requires external pull-up resistors on both SDA and SCL lines because its I²C interface uses open-drain outputs. The value depends on bus capacitance and desired rise time; typical values range from 2.2 kΩ to 10 kΩ for standard-mode I²C at 100 kHz.

How many AT24C04N-10SI-1.8 devices can share the same I²C bus?

Up to four AT24C04N-10SI-1.8 devices can share one I²C bus. This is enabled by hardwiring A1 and A2 pins to VCC or GND to set unique 3-bit device address bits; A0 is not used and must be left unconnected.

What happens to the AT24C04N-10SI-1.8 when the WP pin is tied to VCC?

When the WP pin of AT24C04N-10SI-1.8 is tied to VCC, the entire 4K memory array becomes write-protected. All write operations - including byte writes, page writes, and erase - are inhibited, while read operations remain fully functional.

Is AT24C04N-10SI-1.8 compatible with standard I²C protocol implementations?

Yes, AT24C04N-10SI-1.8 fully complies with the standard I²C protocol, including START/STOP conditions, 7-bit addressing with R/W bit, ACK/NACK handshaking, and byte/page write sequences. It requires no special controller extensions beyond standard I²C master functionality.